Research Area: Heat Transfer and Solar Energy :
Have carried experimental and numerical studies of heat transfer and fluid flow on an Internally Heated Vertical Annular Closed Loop Thermo-syphon with working fluids, such as water, ethanol and methanol applicable in the refrigeration systems and in cooling of nuclear fuel rods during power/pump failure. Shortage of fuel and electricity has diverted the attention towards development of the Solar Water Heater and Solar Distillation Plants. Experimental studies on Natural Convection Solar Water Heater, Solar Cooker and Solar Still have been carried out to estimate their performance. Depletion of the stratospheric ozone, due to CFC's and HCFC's needs replacement. Some of the promising refrigerants suitable for the alternate system, that is, the vapour absorption which can be operated by renewable forms of heat energy are ethanol and methanol along with water. Therefore, Vapour Absorption Cycles at single, double and triple stages have been modeled for thermodynamic analysis. Subsequently, their performance have been analyzed and conditions for economic utilization of energy, like solar, biogas, LBG and CNG for cost effective air-conditioning systems with maximum efficiency have been propose.
Experimental and Numerical Analyses of Natural Convection flow in a partially heated Vertical Annulus, Numerical Heat Transfer- Part A, Taylor & Francis, 2017, ISSN: 0891-6152 , Vol. 30, No.1, pp. 25-45.
Experimental Studies on Natural Convection of Water in a Closed Loop Vertical Annulus, Experimental Heat Transfer, Taylor & Francis, 2017, ISSN: 0891-6152 , Vol. 30, No.1 pp. 25-45.
Experimental Study of Boiling Incipience in a Closed Loop Vertical Annular Thermo-siphon, Applied Thermal Engineering, Elsevier Ltd. 2010 , Vol. 30, Issues 11-12 pp.1333-1340.
Heat Transfer Studies during Natural Convection Boiling in an Internally Heated Annulus, Int. J. Heat and Mass Transfer, Elsevier Science Ltd. Pergamon, 2003,Vol. 46, No.6, pp.1085-1095.
Economic Analysis of Two Stage Dual-Fluid Absorption Cycle for Optimizing Generator Temperatures
Energy Convers. & Mmgt. Elsevier Science Ltd. 2001,Vol. 42, pp.407-437.
Performance and Economic study of the combined Absorption/ Compression Heat Pump, Energy Convers. & Mmgt. Elsevier Science Ltd. 1999, Vol. 40, pp.575-591.
Economic Analyses of the Absorption Systems: Part A-Design and Cost Evaluation, Energy Convers. & Mmgt. Elsevier Science Ltd. 1997, Vol. 38, No. 9, pp.889-904.
Economic Feasibility and Performance Study of Solar Powered Absorption Cycle Using Some Aqueous Salt Solutions, Journal of Solar Energy Engineering, Transactions of ASME , Feb. 1997, Vol. 119, pp. 31-34 .